Minimum detection object
                                        Φ0.5
                                     
                                        Detection distance ff-403
                                        High speed mode 80
Standard mode 160
Long distance mode 200
                                     
                                        classification
                                        FFR series
                                     
                                        Detection distance ff-301
                                        High speed mode 100
Standard mode 180
Long distance mode 700
                                     
                                        Minimum bending radius (fiber length)
                                        R25(1M)